Overview
Sodium heptanesulfonate (CAS 22767-50-6 ) is an anionic surfactant and ion-pairing reagent used across pharmaceutical, industrial, and personal care manufacturing. It functions primarily as a mobile phase modifier in HPLC separations.
The compound also serves as a surface-active agent in formulation and cleaning applications. In pharmaceutical manufacturing, it is the reagent of choice for ion-pair reversed-phase HPLC workflows.
This reagent enables the separation and quantification of basic drug compounds and their impurities in quality control. Personal care formulators incorporate it into cleansing systems for controlled emulsification.
It provides low-irritation surfactancy where required. In textile and leather processing, it supports degreasing baths and dyeing auxiliaries where consistent dispersion of hydrophobic substrates is critical.
Printing and packaging operations use it in ink formulations and surface treatment processes. These applications help to improve wetting and adhesion on various treated substrates during production.
Sodium heptanesulfonate is supplied as a white crystalline powder or as an aqueous solution. Anhydrous and monohydrate forms are both commercially available for different industrial needs.
The monohydrate is the standard grade for chromatographic use. It is sourced to reagent-grade and HPLC-grade specifications, with food-contact and technical grades available for industrial applications.
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Physical Properties
| Melting Point | >300 °C(lit.) |
| Density | 1.017 g/cm |
| Appearance | White crystalline powder |
| Color | White |
| Form | Crystalline Powder of Flakes |
| Water Solubility | soluble |
| pH | 5.5-7.5 (100g/l, H2O, 20℃) |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29041000 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 22767-50-6
- EC Number
- 245-210-5
- Mol. Weight
- 202.25
- HS Code
- 29041000
- Category
- Salts & Minerals